{"id":5746,"date":"2022-01-09T01:38:52","date_gmt":"2022-01-09T09:38:52","guid":{"rendered":"https:\/\/www.xh86.me\/?p=5746"},"modified":"2022-01-09T02:10:26","modified_gmt":"2022-01-09T10:10:26","slug":"%e5%88%86%e5%b1%82%e7%bd%91%e7%bb%9c%e6%9e%b6%e6%9e%84%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"https:\/\/www.xh86.me\/?p=5746","title":{"rendered":"\u5206\u5c42\u7f51\u7edc\u67b6\u6784\u8bbe\u8ba1"},"content":{"rendered":"
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<\/section>\n<\/section>\n<\/section>\n

1.0 \u5f15\u8a00<\/h1>\n

\u7f51\u7edc\u4e0d\u4ec5\u8981\u6ee1\u8db3\u4f01\u4e1a\u7684\u5f53\u524d\u9700\u6c42\uff0c\u8fd8\u8981\u80fd\u6f14\u8fdb\u4ee5\u652f\u6301\u65b0\u7684\u6280\u672f\u3002\u7f51\u7edc\u8bbe\u8ba1\u539f\u5219\u548c\u6a21\u578b\u80fd\u5e2e\u52a9 \u7f51\u7edc\u5de5\u7a0b\u5e08\u8bbe\u8ba1\u548c\u5efa\u9020\u7075\u6d3b\u3001\u6709\u5f39\u6027\u548c\u65b9\u4fbf\u7ba1\u7406\u7684\u7f51\u7edc\u3002<\/p>\n

\u672c\u7ae0\u5c06\u4ecb\u7ecd\u7f51\u7edc\u8bbe\u8ba1\u7684\u6982\u5ff5\u3001\u539f\u5219\u3001\u6a21\u578b\u548c\u67b6\u6784\uff0c\u4ee5\u53ca\u9075\u5faa\u7cfb\u7edf\u7684\u8bbe\u8ba1\u65b9\u6cd5\uff08systematic design approach\uff09\u6240\u5e26\u6765\u7684\u6536\u76ca\u3002<\/p>\n

1.1 \u5206\u5c42\u7f51\u7edc\u8bbe\u8ba1\u7efc\u8ff0<\/h1>\n

\u601d\u79d1\u7684\u5206\u5c42\uff08\u4e09\u5c42\uff09\u4e92\u8fde\u7f51\u7edc\u6a21\u578b<\/span>\uff08hierarchical internetworking model\uff09\u662f\u5de5\u4e1a\u754c \u8bbe\u8ba1\u53ef\u9760\u3001\u53ef\u6269\u5c55\u3001\u9ad8\u6027\u4ef7\u6bd4\u7684\u4e92\u8fde\u7f51\u7edc\u65f6\u5e7f\u6cdb\u91c7\u7528\u7684\u6a21\u578b\u3002\u5728\u672c\u7ae0\u4e2d\uff0c\u4f60\u5c06\u5b66\u4e60\u5230\u63a5\u5165\u5c42 \u3001\u5206\u53d1\u5c42\uff08\u601d\u79d1\u8fd9\u91cc\u79f0\u4f5c distribution layer\uff0c\u4f46\u66f4\u901a\u7528\u7684\u79f0\u547c\u662f aggregation layer\uff0c \u5373\u6c47\u805a\u5c42\u3002\u8bd1\u8005\u6ce8\uff09\u3001\u6838\u5fc3\u5c42\uff0c\u4ee5\u53ca\u5b83\u4eec\u5728\u5206\u5c42\u7f51\u7edc\u6a21\u578b\u4e2d\u627f\u62c5\u7684\u89d2\u8272\u3002<\/p>\n

1.1.1 \u4f01\u4e1a\u7f51\u7edc\u8bbe\u8ba1<\/h2>\n

\u5bf9\u7f51\u7edc\u89c4\u6a21\u7684\u4e86\u89e3<\/span>\uff0c\u4ee5\u53ca\u826f\u597d\u7684\u7ed3\u6784\u5316\u5de5\u7a0b\u539f\u5219<\/span>\uff08an understanding of network scale and knowledge of good structured engineering principles\uff09\uff0c\u5bf9\u8ba8\u8bba \u7f51\u7edc\u8bbe\u8ba1\u975e\u5e38\u6709\u5e2e\u52a9\u3002<\/p>\n

1.1.1.1 \u7f51\u7edc\u9700\u6c42<\/h3>\n

\u8ba8\u8bba\u7f51\u7edc\u8bbe\u8ba1\u65f6\uff0c\u901a\u5e38\u6839\u636e\u8bbe\u5907\u6570\u91cf\u5c06\u7f51\u7edc\u5206\u6210\u51e0\u7c7b\uff1a<\/p>\n

    \n
  • \u5c0f\u578b\u7f51\u7edc\uff1a\u652f\u6301\u6700\u591a 200 \u4e2a\u8bbe\u5907<\/li>\n
  • \u4e2d\u578b\u7f51\u7edc\uff1a\u652f\u6301 200 ~ 1000 \u4e2a\u8bbe\u5907<\/li>\n
  • \u5927\u578b\u7f51\u7edc\uff1a\u652f\u6301 1000+ \u8bbe\u5907<\/li>\n<\/ul>\n

    \u7f51\u7edc\u8bbe\u8ba1\u968f\u89c4\u6a21\u548c\u516c\u53f8\u9700\u6c42\u7684\u4e0d\u540c\u800c\u4e0d\u540c\u3002\u4f8b\u5982\uff0c\u5c0f\u516c\u53f8\u7684\u8bbe\u5907\u6570\u91cf\u6bd4\u8f83\u5c11\uff0c\u56e0\u6b64\u7f51\u7edc\u57fa\u7840 \u8bbe\u65bd\u5c31\u65e0\u9700\u50cf\u5927\u516c\u53f8\u8bbe\u8ba1\u7684\u90a3\u4e48\u590d\u6742\u3002<\/p>\n

    \u7f51\u7edc\u8bbe\u8ba1\u9700\u8981\u8003\u8651\u5f88\u591a\u53d8\u91cf\u3002\u4f8b\u5982\uff0c\u56fe 1-1 \u662f\u4e00\u4e2a\u7531\u4e3b site \u6784\u6210\u7684\u5927\u578b\u4f01\u4e1a\u7f51\u7edc\u8fde\u63a5 \u5c0f\u578b\u3001\u4e2d\u578b\u3001\u5927\u578b site \u7684\u9ad8\u5c42\u62d3\u6251\u793a\u4f8b\u3002<\/p>\n

    <\/div><\/p>\n

    \u56fe 1-1 \u5927\u578b\u4f01\u4e1a\u7f51\u7edc\u8bbe\u8ba1<\/p>\n

    \u7f51\u7edc\u8bbe\u8ba1\u9886\u57df\u8fd8\u5728\u5feb\u901f\u53d1\u5c55\uff0c\u9700\u8981\u7528\u5230\u5927\u91cf\u7684\u77e5\u8bc6\u548c\u7ecf\u9a8c\u3002\u672c\u8282\u7684\u76ee\u7684\u662f\u4ecb\u7ecd\u4e00\u4e9b\u7f51\u7edc\u8bbe\u8ba1 \u9886\u57df\u5df2\u7ecf\u5e7f\u6cdb\u63a5\u53d7\u7684\u6982\u5ff5\u3002<\/p>\n

    1.1.1.2 \u7ed3\u6784\u5316\u5de5\u7a0b\u539f\u5219<\/h3>\n

    \u4e0d\u7ba1\u7f51\u7edc\u89c4\u6a21\u548c\u4f01\u4e1a\u9700\u6c42\u5982\u4f55\uff0c\u7ed3\u6784\u5316\u5de5\u7a0b\u539f\u5219\u90fd\u662f\u8bbe\u8ba1\u4e00\u4e2a\u6210\u529f\u7684\u7f51\u7edc\u67b6\u6784\u7684\u5173\u952e\u56e0 \u7d20\u3002\u8fd9\u4e9b\u539f\u5219\u5305\u62ec\uff1a<\/p>\n

      \n
    • \u5c42\u7ea7\u5316<\/span>\uff08hierarchy\uff09\uff1a\u5206\u5c42\u7f51\u7edc\u6a21\u578b\uff08hierarchical network model\uff09\u662f\u8bbe\u8ba1\u53ef\u9760 \u7684\u7f51\u7edc\u57fa\u7840\u8bbe\u65bd\u65f6\u975e\u5e38\u6709\u7528\u7684\u9ad8\u5c42\u5de5\u5177\uff0c\u5b83\u5c06\u590d\u6742\u7684\u7f51\u7edc\u8bbe\u8ba1\u95ee\u9898\u62c6\u5206\u4e3a\u66f4\u5c0f\u7684\u6613\u638c\u63a7\u7684 \u82e5\u5e72\u4e2a\u9886\u57df\u3002<\/li>\n
    • \u6a21\u5757\u5316<\/span>\uff08modularity\uff09\uff1a\u5c06\u529f\u80fd\u5212\u5206\u4e3a\u51e0\u4e2a\u7f51\u7edc\u6a21\u5757\u4f1a\u4f7f\u8bbe\u8ba1\u66f4\u5bb9\u6613\u3002Cisco \u5b9a\u4e49\u7684\u6a21\u5757\u5305\u62ec\u4f01\u4e1a\u7f51\uff08enterprise campus\uff09\u3001\u670d\u52a1\u6a21\u5757\uff08service block\uff09\u3001\u6570 \u636e\u4e2d\u5fc3\uff08data center\uff09\u3001\u4ee5\u53ca\u4e92\u8054\u7f51\u8fb9\u7f18\uff08internet edge\uff09\u3002<\/li>\n
    • \u5f39\u6027<\/span>\uff08resiliency\uff09\uff1a\u4fdd\u8bc1\u7f51\u7edc\u5728\u6b63\u5e38\u548c\u5f02\u5e38\u7684\u60c5\u51b5\u4e0b\u90fd\u53ef\u7528\uff08 available for use\uff09\u3002\u6b63\u5e38\u7684\u60c5\u51b5\u5305\u62ec\u6b63\u5e38\u6216\u9884\u671f\u7684\u7f51\u7edc\u6d41\u91cf\u548c\u6a21\u5f0f\uff08traffic flow and traffic patterns\uff09\uff0c\u8ba1\u5212\u4e8b\u4ef6\uff0c\u4f8b\u5982\u7ef4\u62a4\u7a97\u53e3\uff08maintenance window\uff09\u3002\u4e0d\u6b63 \u5e38\u7684\u60c5\u51b5\u5305\u62ec\u786c\u4ef6\u548c\u8f6f\u4ef6\u6545\u969c\u3001\u6781\u7aef\u7f51\u7edc\u6d41\u91cf\u3001\u5f02\u5e38\u6d41\u91cf\uff08unusual traffic patterns\uff09\u3001DoS \u4e8b\u4ef6\u3001\u8ba1\u5212\u5916\u4e8b\u4ef6\u7b49\u7b49\u3002<\/li>\n
    • \u7075\u6d3b\u6027<\/span>\uff08flexibility\uff09\uff1a\u5728\u4e0d\u5bf9\u7f51\u7edc\u505a\u6839\u672c\u6027\u6539\u9020\uff08forklift upgrade\uff09\u7684\u524d\u63d0 \u4e0b\uff08\u4f8b\u5982\u66f4\u6362\u4e3b\u8981\u7684\u786c\u4ef6\u8bbe\u5907\uff09\uff0c\u6709\u4fee\u6539\u90e8\u5206\u7f51\u7edc\u3001\u6dfb\u52a0\u65b0\u670d\u52a1\u6216\u6269\u5bb9\u7684\u80fd\u529b<\/li>\n<\/ul>\n

      \u8981\u6ee1\u8db3\u8fd9\u4e9b\u57fa\u7840\u7684\u8bbe\u8ba1\u76ee\u6807\uff0c\u7f51\u7edc\u5fc5\u987b\u6784\u5efa\u5728\u5206\u5c42\u67b6\u6784\u4e4b\u4e0a\uff0c\u8fd9\u6837\u7684\u67b6\u6784\u8db3\u591f\u7075\u6d3b\uff0c\u5e76\u4e14\u652f \u6301\u7f51\u7edc\u89c4\u6a21\u7684\u589e\u957f\u3002<\/p>\n

      1.1.2 \u5206\u5c42\u7f51\u7edc\u8bbe\u8ba1<\/h2>\n

      \u672c\u8282\u8ba8\u8bba\u5206\u5c42\u7f51\u7edc\u6a21\u578b\u7684\u4e09\u4e2a\u5c42\uff1a\u63a5\u5165\u5c42\u3001\u5206\u53d1\u5c42\u3001\u6838\u5fc3\u5c42\u3002<\/p>\n

      1.1.2.1 \u7f51\u7edc\u5c42\u7ea7\uff08Network Hierarchy\uff09<\/h3>\n

      \u65e9\u671f\u7684\u7f51\u7edc\u90fd\u662f\u6241\u5e73\u62d3\u6251\uff08flat topology\uff09\uff0c\u5982\u56fe 1-2 \u6240\u793a\u3002<\/p>\n

      <\/div><\/p>\n

      \u56fe 1-2 \u6241\u5e73\u7f51\u7edc<\/p>\n

      \u5f53\u66f4\u591a\u7684\u8bbe\u5907\u9700\u8981\u63a5\u5165\u7f51\u7edc\u65f6\uff0c\u5c31\u6dfb\u52a0\u96c6\u7ebf\u5668\uff08hub\uff09\u548c\u4ea4\u6362\u673a\uff08switch\uff09\u3002\u6241\u5e73\u7f51\u7edc\u8bbe\u8ba1 \u7684\u7f3a\u70b9\u662f\u5f88\u96be\u63a7\u5236\u5e7f\u64ad\u6d41\u91cf\uff0c\u6216\u8005\u5bf9\u7279\u5b9a\u6d41\u91cf\u8fdb\u884c\u8fc7\u6ee4<\/span>\u3002\u5f53\u7f51\u7edc\u4e2d\u7684\u8bbe\u5907\u8d8a\u6765\u8d8a\u591a\u65f6\uff0c \u54cd\u5e94\u65f6\u95f4\u4e5f\u4f1a\u8d8a\u6765\u8d8a\u6162\uff0c\u6700\u7ec8\u4f7f\u5f97\u7f51\u7edc\u4e0d\u53ef\u7528\u3002<\/p>\n

      \u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u66f4\u597d\u7684\u65b9\u6848\u3002\u73b0\u5728\uff0c\u5927\u90e8\u5206\u516c\u53f8\u90fd\u4f7f\u7528\u56fe 1-3 \u6240\u793a\u7684\u5206\u5c42\u7f51\u7edc\u65b9\u6848\u3002<\/p>\n

      <\/div><\/p>\n

      \u56fe 1-3 \u5206\u5c42\u7f51\u7edc<\/p>\n

      \u5206\u5c42\u7f51\u7edc\u8bbe\u8ba1\u5c06\u7f51\u7edc\u5212\u5206\u4e3a\u591a\u4e2a\u72ec\u7acb\u7684\u5c42\u7ea7\uff08discrete layers\uff09\uff0c\u6bcf\u4e00\u5c42\uff08 layer\uff0cor tier\uff09\u63d0\u4f9b\u7279\u5b9a\u7684\u529f\u80fd\uff0c\u8fd9\u4e9b\u529f\u80fd\u4e5f\u5b9a\u4e49\u4e86\u5b83\u4eec\u5728\u6574\u4e2a\u7f51\u7edc\u67b6\u6784\u4e2d\u7684\u89d2\u8272\u3002\u8fd9 \u79cd\u8bbe\u8ba1\u4f7f\u5f97\u7f51\u7edc\u8bbe\u8ba1\u5e08\u548c\u67b6\u6784\u5e08\u53ef\u4ee5\u9488\u5bf9\u6bcf\u5c42\u7684\u89d2\u8272\u6765\u4f18\u5316\u548c\u9009\u62e9\u5408\u9002\u7684\u7f51\u7edc\u786c\u4ef6 \u3001\u8f6f\u4ef6\u548c\u529f\u80fd\u7279\u6027\u3002\u5206\u5c42\u7f51\u7edc\u6a21\u578b\u5bf9\u5c40\u57df\u7f51\uff08LAN\uff09\u548c\u5e7f\u57df\u7f51\uff08WAN\uff09\u8bbe\u8ba1\u5747\u4f7f\u7528\u3002<\/p>\n

      \u5c06\u6241\u5e73\u7f51\u7edc\u5212\u5206\u6210\u66f4\u5c0f\u3001\u66f4\u6613\u7ba1\u7406\u7684\u7ec4\u6210\u90e8\u5206\u7684\u597d\u5904\u662f\u53ef\u4ee5\u5c06\u672c\u5730\u6d41\u91cf\u9650\u5236\u5728\u672c\u5730<\/span>\uff08 local traffic remains local\uff09\u3002\u53ea\u6709\u76ee\u7684\u662f\u5176\u4ed6\u7f51\u7edc\u7684\u6d41\u91cf\u624d\u4f1a\u88ab\u4f20\u9001\u5230\u66f4\u9ad8\u7684\u5c42\u3002\u4f8b \u5982\u56fe 1-3 \u6240\u793a\u7684\u6241\u5e73\u7f51\u7edc\u5df2\u7ecf\u88ab\u5212\u5206\u4e3a\u4e09\u4e2a\u72ec\u7acb\u7684\u5e7f\u64ad\u57df\uff08broadcast domains\uff09\u3002<\/p>\n

      \u4e00\u4e2a\u5178\u578b\u7684\u4f01\u4e1a\u5206\u5c42\u5c40\u57df\u7f51\uff08hierarchical LAN\uff09\u5305\u62ec\u4e09\u5c42\uff1a<\/p>\n

        \n
      • \u63a5\u5165\u5c42<\/span>\uff1a\u63d0\u4f9b\u5de5\u4f5c\u7ec4\/\u7528\u6237\u63a5\u5165\u7f51\u7edc\u7684\u529f\u80fd<\/li>\n
      • \u5206\u53d1\u5c42<\/span>\uff1a\u63d0\u4f9b\u57fa\u4e8e\u7b56\u7565\u7684\u8fde\u63a5\u529f\u80fd\uff0c\u63a7\u5236\u63a5\u5165\u5c42\u548c\u6838\u5fc3\u5c42\u7684\u8fb9\u754c<\/li>\n
      • \u6838\u5fc3\u5c42<\/span>\uff1a\u63d0\u4f9b\u5206\u53d1\u5c42\u4ea4\u6362\u673a\u4e4b\u95f4\u7684\u9ad8\u901f\u4f20\u8f93<\/li>\n<\/ul>\n

        \u53e6\u4e00\u4e2a\u4e09\u5c42\u5206\u5c42\u7f51\u7edc\u8bbe\u8ba1\u5982\u56fe 1-4 \u6240\u793a\uff0c\u6ce8\u610f\u5176\u4e2d\u7684\u6bcf\u4e2a building \u90fd\u662f\u5206\u5c42\u7f51\u7edc\u6a21\u578b \uff0c\u5305\u62ec\u4e86\u63a5\u5165\u5c42\u3001\u5206\u53d1\u5c42\u548c\u6838\u5fc3\u5c42\u3002<\/p>\n

        <\/div><\/p>\n

        \u56fe 1-4 \u591a\u5efa\u7b51\u533a\uff08Multi Building\uff09\u4f01\u4e1a\u7f51\u7edc\u8bbe\u8ba1<\/p>\n

        \n

        \u6ce8\u610f\uff1a\u8bbe\u8ba1\u7f51\u7edc\u7684\u7269\u7406\u62d3\u6251\u5e76\u6ca1\u6709\u7edd\u5bf9\u7684\u89c4\u5219\u3002\u867d\u7136\u5f88\u591a\u7f51\u7edc\u90fd\u662f\u57fa\u4e8e\u4e09\u5c42\u7684\u7269\u7406 \u8bbe\u5907\u642d\u5efa\u7684\uff0c\u4f46\u8fd9\u5e76\u4e0d\u662f\u5f3a\u5236\u6761\u4ef6\u3002\u5728\u5c0f\u4e00\u4e9b\u7684\u7f51\u7edc\u4e2d\uff0c\u6838\u5fc3\u5c42\u548c\u5206\u53d1\u5c42\u53ef\u80fd\u4f1a\u5408\u5e76\u4e3a \u4e00\u5c42\uff0c\u7531\u540c\u4e00\u4e2a\u7269\u7406\u4ea4\u6362\u673a\u5145\u5f53\uff0c\u8fd9\u6837\u7f51\u7edc\u5c31\u53d8\u6210\u4e86\u4e24\u5c42\u3002\u8fd9\u88ab\u79f0\u4e3a collapsed core design\uff08\u584c\u7f29\u7684\u6838\u5fc3\u5c42\u8bbe\u8ba1\uff09\u3002<\/p>\n<\/blockquote>\n

        1.1.2.1 \u63a5\u5165\u5c42\uff08Access Layer\uff09<\/h3>\n

        \u5728\u5c40\u57df\u7f51\u4e2d\uff0c\u63a5\u5165\u5c42\u63d0\u4f9b\u7ec8\u7aef\u8bbe\u5907\u63a5\u5165\u7f51\u7edc\u7684\u529f\u80fd\uff1b\u5728\u5e7f\u57df\u7f51\u4e2d\uff0c\u5b83\u53ef\u80fd\u8fd8\u63d0\u4f9b\u8fdc\u7a0b\u529e\u516c\uff08 teleworker\uff09\u6216\u8fdc\u7a0b site \u901a\u8fc7 WAN \u8bbf\u95ee\u516c\u53f8\u7f51\u7edc\u7684\u529f\u80fd\u3002<\/p>\n

        \u5982\u56fe 1-5 \u6240\u793a\uff0c\u5c0f\u7684\u5546\u4e1a\u7f51\u7edc\u7684\u63a5\u5165\u5c42\u901a\u5e38\u7531 L2 \u4ea4\u6362\u673a\u548c\u63a5\u5165\u70b9\u6784\u6210\uff0c\u63d0\u4f9b\u5de5\u4f5c\u7ad9\u548c\u670d \u52a1\u5668\u4e4b\u95f4\u7684\u4e92\u8054\u3002<\/p>\n

        <\/div><\/p>\n

        \u56fe 1-5 \u63a5\u5165\u5c42<\/p>\n

        \u63a5\u5165\u5c42\u7684\u529f\u80fd\u5305\u62ec\uff1a<\/p>\n

          \n
        1. \u4e8c\u5c42\u8f6c\u53d1<\/li>\n
        2. \u9ad8\u53ef\u7528<\/li>\n
        3. \u7aef\u53e3\u5b89\u5168\uff08port security\uff09<\/li>\n
        4. QoS \u5206\u7c7b\u548c\u6807\u8bb0\uff0c\u4fe1\u4efb\u8fb9\u754c\uff08trust boundaries\uff09<\/li>\n
        5. ARP inspection<\/li>\n
        6. \u865a\u62df\u8bbf\u95ee\u63a7\u5236\u5217\u8868\uff08Virtual ACL, VACL\uff09<\/li>\n
        7. \u751f\u6210\u6811\uff08spanning tree\uff09<\/li>\n
        8. Power over Ethernet (PoE) and auxiliary VLANs for VoIP<\/li>\n<\/ol>\n

          1.1.2.3 \u5206\u53d1\u5c42\uff08Distribution Layer\uff09<\/h3>\n

          \u5206\u53d1\u5c42\u5bf9\u63a5\u5165\u5c42\u7684\u5305\u8fdb\u884c\u805a\u5408\uff08aggregate\uff09\uff0c\u7136\u540e\u9001\u5230\u6838\u5fc3\u5c42\u8fdb\u884c\u8def\u7531\u3002\u5982\u56fe 1-6 \u6240\u793a\uff0c\u5206\u53d1\u5c42\u662f L2 \u7f51\u7edc\uff08\u4ea4\u6362\uff09\u548c L3 \u7f51\u7edc\uff08\u8def\u7531\uff09\u7684\u8fb9\u754c<\/span>\u3002<\/p>\n

          <\/div><\/p>\n

          \u56fe 1-6 \u5206\u53d1\u5c42<\/p>\n

          \u5206\u53d1\u5c42\u8bbe\u5907\u662f\u5e03\u7ebf\u5ba4\uff08wiring closet\uff09\u7684\u6838\u5fc3\uff08focal point\uff09\u3002\u901a\u5e38\u4f7f\u7528\u8def\u7531\u5668\u6216\u8005\u591a\u5c42 \u4ea4\u6362\u673a\uff08multilayer switch\uff09\u5212\u5206\u5de5\u4f5c\u7ec4\u548c\u9694\u79bb\u7f51\u7edc\u95ee\u9898\u3002<\/p>\n

          \u4e00\u4e2a\u5206\u53d1\u5c42\u4ea4\u6362\u673a\u53ef\u80fd\u4f1a\u4e3a\u8bb8\u591a\u63a5\u5165\u5c42\u4ea4\u6362\u673a\u63d0\u4f9b\u4e0a\u6e38\u670d\u52a1\uff08upstream services\uff09\u3002<\/p>\n

          \u5206\u53d1\u5c42\u63d0\u4f9b\u7684\u529f\u80fd\uff1a<\/p>\n

            \n
          1. \u805a\u5408 LAN \u6216 WAN \u94fe\u8def<\/li>\n
          2. \u57fa\u4e8e\u7b56\u7565\u7684\u5b89\u5168\uff0c\u901a\u8fc7 ACL \u548c filtering \u5f62\u5f0f<\/li>\n
          3. LAN \u548c VLAN \u4e4b\u95f4\uff0c\u4ee5\u53ca\u8def\u7531\u57df\uff08\u4f8b\u5982 EIGRP \u5230 OSPF\uff09\u4e4b\u95f4\u7684\u8def\u7531\u670d\u52a1<\/li>\n
          4. \u5197\u4f59\u548c\u8d1f\u8f7d\u5747\u8861<\/li>\n
          5. \u8def\u7531\u805a\u5408\u548c\u6458\u8981\u7684\u8fb9\u754c\uff0c\u914d\u7f6e\u5728\u4e0e\u6838\u5fc3\u5c42\u8fde\u63a5\u7684\u7aef\u53e3\u4e0a<\/li>\n
          6. \u5e7f\u64ad\u57df\u63a7\u5236\uff08\u8def\u7531\u5668\u548c\u591a\u5c42\u4ea4\u6362\u673a\u4e0d\u8f6c\u53d1\u5e7f\u64ad\u5305\uff09\uff0c\u5206\u53d1\u5c42\u8bbe\u5907\u5145\u5f53\u4e86\u5e7f\u64ad\u57df\u4e4b\u95f4\u7684\u8fb9\u754c\uff08demarcation\uff09<\/li>\n<\/ol>\n

            1.1.2.4 \u6838\u5fc3\u5c42\uff08Core Layer\uff09<\/h3>\n

            \u6838\u5fc3\u5c42\u4e5f\u79f0\u4f5c\u7f51\u7edc\u9aa8\u5e72\uff08network backbone\uff09\uff0c\u7531\u9ad8\u901f\u7f51\u7edc\u8bbe\u5907\u7ec4\u6210\uff0c\u4f8b\u5982 Cisco Catalyst 6500 \u548c 6800\u3002\u6838\u5fc3\u5c42\u8bbe\u8ba1\u7528\u6765\u5c3d\u53ef\u80fd\u5feb\u5730\u8f6c\u53d1\u5305\uff0c\u4ee5\u53ca\u4e92\u8054\u591a\u4e2a\u7f51\u7edc\u6a21\u5757<\/span>\u00a0\uff0c\u4f8b\u5982\u5206\u53d1\u6a21\u5757\u3001\u670d\u52a1\u6a21\u5757\u3001\u6570\u636e\u4e2d\u5fc3\uff0c\u4ee5\u53ca WAN \u8fb9\u7f18\u3002<\/p>\n

            \u4ece\u56fe 1-7 \u53ef\u4ee5\u770b\u51fa\uff0c\u6838\u5fc3\u5c42\u5bf9\u5206\u53d1\u5c42\u8bbe\u5907\u7684\u4e92\u8054\u975e\u5e38\u5173\u952e\uff08\u4f8b\u5982\uff0c\u5c06\u5206\u53d1\u5c42\u8fde\u63a5\u5230 WAN \u548c \u56e0\u7279\u7f51\u8fb9\u7f18\uff09\u3002<\/p>\n

            <\/div><\/p>\n

            \u56fe 1-7 \u6838\u5fc3\u5c42<\/p>\n

            \u6838\u5fc3\u5c42\u5e94\u5f53\u662f\u9ad8\u53ef\u7528\u548c\u6709\u5197\u4f59\u7684\u3002\u6838\u5fc3\u5c42\u5bf9\u5206\u53d1\u5c42\u8bbe\u5907\u7684\u6240\u6709\u6d41\u91cf\u8fdb\u884c\u805a\u5408\uff0c\u56e0\u6b64\u8f6c \u53d1\u6570\u636e\u7684\u6027\u80fd\u5fc5\u987b\u5f88\u9ad8\u3002<\/p>\n

            \u6838\u5fc3\u5c42\u9700\u8981\u8003\u8651\uff1a<\/p>\n

              \n
            1. \u9ad8\u901f\u4ea4\u6362\uff08\u4f8b\u5982\uff0cfast transport\uff09<\/li>\n
            2. \u53ef\u9760\u6027\u548c\u5bb9\u9519<\/li>\n
            3. \u901a\u8fc7\u66f4\u5feb\u7684\u800c\u4e0d\u662f\u66f4\u591a\u7684\u8bbe\u5907\u8fdb\u884c\u6269\u5c55<\/span>\uff08scaling by using faster, not more, equipment\uff09<\/li>\n
            4. \u907f\u514d\u5bf9\u5305\u8fdb\u884c CPU \u5bc6\u96c6\u7684\u64cd\u4f5c\uff0c\u8fd9\u4e9b\u64cd\u4f5c\u53ef\u80fd\u6765\u81ea\u5b89\u5168\u3001\u68c0\u6d4b\u3001QoS \u5206\u7c7b\u6216\u5176\u4ed6\u8fc7\u7a0b<\/li>\n<\/ol>\n

              1.1.2.5 Two-Tier Collapsed Core Design\uff08\u4e24\u5c42\u584c\u7f29\u6838\u5fc3\u5c42\u8bbe\u8ba1\uff09<\/h3>\n

              \u4e09\u5c42\u5206\u5c42\u8bbe\u8ba1\u6700\u5927\u5316\u4e86\u6027\u80fd\u3001\u7f51\u7edc\u53ef\u7528\u6027\u3001\u4ee5\u53ca\u7f51\u7edc\u8bbe\u8ba1\u7684\u6269\u5c55\u6027\u3002<\/p>\n

              \u7136\u800c\uff0c\u5f88\u591a\u5c0f\u578b\u4f01\u4e1a\u7f51\u7edc\u5e76\u4e0d\u4f1a\u968f\u7740\u65f6\u95f4\u53d8\u7684\u5f88\u5927\u3002\u56e0\u6b64\uff0c\u4e00\u79cd\u5c06\u6838\u5fc3\u5c42\u548c\u5206\u53d1\u5c42\u5408\u5e76 \u7684\u4e24\u5c42\u8bbe\u8ba1\uff08two-tier hierarchical design\uff09\u5c31\u66f4\u52a0\u5b9e\u9645\u3002\u201ccollapsed core\u201d\uff08\u584c\u7f29\u6838\u5fc3 \u5c42\uff09\u5c31\u662f\u6838\u5fc3\u5c42\u548c\u5206\u53d1\u5c42\u5408\u5e76\uff0c\u7531\u540c\u4e00\u4e2a\u8bbe\u5907\u5b9e\u73b0\u5176\u529f\u80fd\u3002\u8fd9\u79cd\u8bbe\u8ba1\u7684\u4e3b\u8981\u76ee\u7684\u5c31\u662f\u5728\u4fdd \u7559\u4e09\u5c42\u6a21\u578b\u7684\u5927\u90e8\u5206\u597d\u5904\u7684\u540c\u65f6\uff0c\u964d\u4f4e\u7f51\u7edc\u6210\u672c<\/span>\u3002<\/p>\n

              \u5728\u56fe 1-8 \u4e2d\uff0c\u6838\u5fc3\u5c42\u548c\u5206\u53d1\u5c42\u8bbe\u5907\u5408\u5e76\u6210\u4e00\u5c42\u8bbe\u5907\uff0c\u7531\u591a\u5c42\u4ea4\u6362\u673a\u6765\u5145\u5f53\u3002<\/p>\n

              <\/div><\/p>\n

              \u56fe 1-8 \u4e24\u7ea7\u5206\u5c42\u8bbe\u8ba1\uff08Two-Tier Hierarchical Design\uff09<\/p>\n

              \u5206\u5c42\u7f51\u7edc\u6a21\u578b\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6a21\u5757\u5316\u7684\u6846\u67b6\uff0c\u4f7f\u5f97\u7f51\u7edc\u8bbe\u8ba1\u66f4\u52a0\u7075\u6d3b\uff0c\u800c\u4e14\u5b9e\u73b0\u548c\u6392\u969c\uff08 trouble shooting\uff09\u4e5f\u66f4\u5bb9\u6613\u3002<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

              1.0 \u5f15\u8a00 \u7f51\u7edc\u4e0d\u4ec5\u8981\u6ee1\u8db3\u4f01\u4e1a\u7684\u5f53\u524d\u9700\u6c42\uff0c\u8fd8\u8981\u80fd\u6f14\u8fdb\u4ee5\u652f\u6301\u65b0\u7684\u6280\u672f\u3002\u7f51\u7edc\u8bbe\u8ba1\u539f\u5219\u548c\u6a21\u578b\u80fd\u5e2e\u52a9 \u7f51\u7edc\u5de5\u7a0b\u5e08\u8bbe\u8ba1 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-5746","post","type-post","status-publish","format-standard","hentry","category-cisco"],"_links":{"self":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/5746","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5746"}],"version-history":[{"count":1,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/5746\/revisions"}],"predecessor-version":[{"id":5799,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/5746\/revisions\/5799"}],"wp:attachment":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5746"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5746"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5746"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}